Secret Domains: The Hidden Digital Realms of U.S. Government Security

Christian Baghai
2 min readMar 17, 2024

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Hey there! So, you’re curious about the digital labyrinth that is the U.S. government’s web development practices, huh? Well, buckle up because we’re diving into a world where domain names are more than just a web address — they’re a gateway to some seriously classified stuff.

Let’s start with the basics: the U.S. Department of State Web Development Handbook. This bad boy is like the bible for web devs working within the State Department. It lays down the law for how websites should be structured and named, and for the most part, it’s pretty much like the open internet. But here’s where it gets interesting: they’ve got this special second-level domain, “sgov,” that they sandwich between ‘state’ and ‘gov’ for some of their sites.

Now, why would they do that? It’s all about keeping things on the down-low. You see, “sgov” is part of a network called SIPRNet. That stands for Secret Internet Protocol Router Network, and it’s where the U.S. Department of Defense and the State Department send their top-secret info back and forth. We’re talking about the kind of stuff that’s so hush-hush it makes your grandma’s secret cookie recipe look like front-page news.

When files zip through SIPRNet, they’re tagged with “SIPDIS,” which is short for SIPrnet DIStribution. It’s like a virtual stamp that says, “Hey, this is for your eyes only, pal.” And just to make sure no one’s peeking who shouldn’t be, there’s a corresponding domain for the Department of Defense users: smil.mil. This is their slice of the secret internet pie, where military secrets stay safe from prying eyes.

So, there you have it — a sneak peek into the digital domain of the U.S. government’s secret networks. It’s a place where every keystroke might be a matter of national security, and where the domain names are more than just a URL — they’re a sign that you’re entering a world of secrets. Just remember, with great power (or in this case, great information) comes great responsibility. Stay curious, my friend!

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Christian Baghai
Christian Baghai

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